Ductor-mounting for printing-presses.



J. R. BLAINE.

DUCTOR MOUNTING FOR PRINTING PRESSES.

APPLICATION FILED IULYB. 19 14.

m fi m Para @FFIQE.

JOSEPH R. BLAINE, OF CHICAGO, ILLINOIS, ASSIGNOR T0 MIEHLE PRINTINGPRESS & MANUFACTURING COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OFILLINOIS.

DUCTOR-MOUNTING- FOR PRINTING-PBESSES.

' Specification of Letters Patent.

Patented May is, rare.

Application filed July 6, 1914. Serial No. 849,118.

To all wfwm it may concern:

Be known that I, JOSEPH R. BLAINE, a citizen of the United States,residing at Chicago, in the county of Cook and State of Illinois, haveinvented certain new and useful Improvements in Ductor-Mountings forPrinting-Presses, of which the following is a specification.

The invention has for its object certain improvements in the mounting ofductor rolls whereby is secured uniformity of yielding pressure contactbetween the ductor roll and ink fountain roll on the one hand and theform or distributing rolls on the other. To this end I provide aconnection between the ductor roll and its operating member in the formof a yielding abutment'for each side of the a'rm, the two abutmentmembers cooperating and compensating in such manner as to secureuniformity of resistance to yielding in either direction.

In order that the invention may be read- .ily understood in its generalapplication I hereinafter describe one embodiment of the same, havingreference to the accompanying drawing in which is set forth forillustrative purposes only a diagrammatic representation of a ductormounted according to the invention in operative relation to an inkfountain and form cylinder.

In the drawing Figure l is a diagrammatic view showing the invention;and Fig.

2 is an enlarged detail sectional view of the,

connection between the ductor arm and the bearing block.

As illustrated, the form cylinder is represented at 11, the ink fountainroll at 12, and the ductor roll at 13, the ductor arm 14 being pivotedat 15. The ductor arm carries bymeans ofastud 16 a pivoted bearing block17 within which slides a rod 18 pivoted at 19 to an operating member 20attached at 21 to a crank arm 22 mounted upon a rotary or rock shaft 23whereby a reciprocating movement is imparted at proper intervals to therod 18. The medial portion of the rod 18 is enlarged throughout thatportion 24: which hasv a sliding bearing within the block 17, thusproviding oppositely facing shoulders which correspond substantiallywith the outer faces of the said bearing block. Abutment-washers 25, 25are mounted upon the rod 18 and bear inwardly against the shouldersformed by the enlargement 24 and also against the outer faces of thebearing block while the two extremities of the rod 18 are provided withadjustable shoulders or stops in the form of threaded washers or nuts26, 28. Between each pair of washers 25, 26, is disposed upon the rod 18a coil spring 27.

It will be readily understood that as the ductor roll 13 is moved intocontact with either of the ink members, that is to say the nk supplyroll 12 or the ink receiving cyllnder 11, the spring 27 upon theopposite slde thereof will be compressed, the rod 18 sliding within thebearing block 17, and the pressure contact between the ductor roll 13and the ink surface will be a yielding one corresponding to the tensionof the spring 27; and as the ductor roll swings in alternation againstthe other ink member the opp 0s1te spring 27 will be placed undertension resulting in a corresponding yielding pressure between theductor roll and the said ink member. By adjusting the nuts 26 upon therod 18 the degree of pressure contact may be regulated within very exactlimits, the springs being maintained under such 1n1t1al tension thatthey will yield only upon the apphcation of a considerable degree ofpressure,

I claim: 1. In a printing press, the combination w th an ink-supplymember and an ink-receivlng member, of a ductor mounted to contactalternately with the two members, a drivlng member, and yieldingconnections between the driving member and the ductor whereby to permitthe ductorto yield in opposite directions as it contacts with each ofthe ink-members, each yielding connection including means to relieve thepressure of I 2. In a printing press, the combination I the resilientconnections independently of the other.

3. In a printing press, the combination with an ink-supply roll, and anink receiving roll, of a ductor roll mounted to swing between the inkrolls into contact alternately therewith, an arm carrying the ductorroll, a bearing block on the arm, a driving member, a rod attached tothe driving member and slidable Within the bearing block, a pair ofterminal bearing abutments provided on the'rod one near each of itsends, apair of intermediate bearing abutments provided on the rod one oneach side of the block, and a spring disposed about the rod between theabutments on each side of the block, whereby to permit theductor toyield as it contacts with each of the ink members.

4. In a printing press, the combination with an ink-supply roll, and anink receiving roll, of a ductor roll mounted to swing between the inkrolls into contact alternately therewith, an arm carrying the duotorroll, a bearing block on the arm, a driving member, a rod attached tothe driving member and slidable within the bearing block, a pair ofterminal bearing abutments provided on the rod one near each of itsends, a pair of intermediate bearing abutments provided on the rod oneon each side of the block and slidable within the block, a washerbearing upon each of the intermediate abutments and adapted to bearagainst -the block, and ai-coil spring about the rod block, the rodhaving formed thereon in its medial portion a pair of shoulderscorresponding substantially to the faces of the block, an abutmentwasher bearing against each of the medial shoulders and each face of theblock, an abutment washer threaded on the rod at each of its ends, and acoil spring disposed about the rod between the two washers on each sideof the block, whereby to permit the ductor to yield. as it contacts witheach of the ink members.

In witness whereof I have hereunto I signed my name in the presence oftwo subscribing witnesses.

JOSEPH R BLAINE. Witnesses:

GEORGE J. DENNIS,

JOHN A. CARROLL.

